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/*
* D-Box 2 flash driver
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <linux/errno.h>
/* partition_info gives details on the logical partitions that the split the
* single flash device into. If the size if zero we use up to the end of the
* device. */
static struct mtd_partition partition_info[]= {
{
.name = "BR bootloader",
.size = 128 * 1024,
.offset = 0,
.mask_flags = MTD_WRITEABLE
},
{
.name = "FLFS (U-Boot)",
.size = 128 * 1024,
.offset = MTDPART_OFS_APPEND,
.mask_flags = 0
},
{
.name = "Root (SquashFS)",
.size = 7040 * 1024,
.offset = MTDPART_OFS_APPEND,
.mask_flags = 0
},
{
.name = "var (JFFS2)",
.size = 896 * 1024,
.offset = MTDPART_OFS_APPEND,
.mask_flags = 0
},
{
.name = "Flash without bootloader",
.size = MTDPART_SIZ_FULL,
.offset = 128 * 1024,
.mask_flags = 0
},
{
.name = "Complete Flash",
.size = MTDPART_SIZ_FULL,
.offset = 0,
.mask_flags = MTD_WRITEABLE
}
};
#define NUM_PARTITIONS ARRAY_SIZE(partition_info)
#define WINDOW_ADDR 0x10000000
#define WINDOW_SIZE 0x800000
static struct mtd_info *mymtd;
struct map_info dbox2_flash_map = {
.name = "D-Box 2 flash memory",
.size = WINDOW_SIZE,
.bankwidth = 4,
.phys = WINDOW_ADDR,
};
static int __init init_dbox2_flash(void)
{
printk(KERN_NOTICE "D-Box 2 flash driver (size->0x%X mem->0x%X)\n", WINDOW_SIZE, WINDOW_ADDR);
dbox2_flash_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
if (!dbox2_flash_map.virt) {
printk("Failed to ioremap\n");
return -EIO;
}
simple_map_init(&dbox2_flash_map);
// Probe for dual Intel 28F320 or dual AMD
mymtd = do_map_probe("cfi_probe", &dbox2_flash_map);
if (!mymtd) {
// Probe for single Intel 28F640
dbox2_flash_map.bankwidth = 2;
mymtd = do_map_probe("cfi_probe", &dbox2_flash_map);
}
if (mymtd) {
mymtd->owner = THIS_MODULE;
/* Create MTD devices for each partition. */
mtd_device_register(mymtd, partition_info, NUM_PARTITIONS);
return 0;
}
iounmap((void *)dbox2_flash_map.virt);
return -ENXIO;
}
static void __exit cleanup_dbox2_flash(void)
{
if (mymtd) {
mtd_device_unregister(mymtd);
map_destroy(mymtd);
}
if (dbox2_flash_map.virt) {
iounmap((void *)dbox2_flash_map.virt);
dbox2_flash_map.virt = 0;
}
}
module_init(init_dbox2_flash);
module_exit(cleanup_dbox2_flash);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Kári Davíðsson <kd@flaga.is>, Bastian Blank <waldi@tuxbox.org>, Alexander Wild <wild@te-elektronik.com>");
MODULE_DESCRIPTION("MTD map driver for D-Box 2 board");
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